Description
x📌 FANUC A20B-3300-0311 — CPU Module (32 MB DRAM)
Part: FANUC A20B-3300-0311
Type: Pentium-based CPU board with 32 MB DRAM
Used In: FANUC Series 16i-B and 18i-B CNC controller systems (older “B-series” CNCs)
🧠 What It Is
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This is a CPU printed circuit board used inside a FANUC CNC controller.
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It features a Pentium processor and 32 MB of DRAM, providing the main computing power for control tasks like program execution, motion control, logic, and communication with I/O, drives, and other CNC modules.
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It’s typically used as a sub-CPU board plugged into a main controller chassis (e.g., A20B-3200 or similar fans).
⚙️ Key Functions
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🛠️ Processing: Executes CNC control software and handles real-time control tasks.
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📊 Memory: The 32 MB DRAM helps the board buffer instructions, programs, and data being processed by the controller.
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🤖 Compatibility: Commonly fits FANUC Series 16i-B and 18i-B controller architectures — older models used on many milling machines, lathes, and machining centers.
📍 Notes & Practical Points
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⚠️ If you replace this module in a CNC controller, stored data (parameters/programs) may be lost and will usually need restoring from backup.
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📦 It’s often sold new surplus, refurbished, or repaired by third-party suppliers.
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🧩 This board works alongside other PCBs in the controller — power supply, main board, I/O cards, display interface, etc.
Additional Information
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Shipping & Return
xReturns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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